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Cheap flights from St. Louis to Sofia from $700

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:30 am - 12:10 pm
STL
-
SOF
19h 40m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$700United Airlines
Tue, May 5 - Sun, May 17
United Airlines Logo
7:30 am - 12:10 pm
STL
-
SOF
20h 40m
2 stops
United Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$704United Airlines
Tue, May 5 - Sun, May 17
Air Canada Logo
7:30 am - 12:10 pm
STL
-
SOF
20h 40m
2 stops
Air Canada Logo
6:10 am - 8:05 pm
SOF
-
STL
45h 55m
2 stops
$708Air Canada
Tue, May 5 - Sun, May 17
United Airlines Logo
6:00 pm - 10:45 pm
STL
-
SOF
20h 45m
2 stops
United Airlines Logo
6:10 am - 9:40 pm
SOF
-
STL
23h 30m
2 stops
$747United Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
2:45 pm - 10:45 pm
STL
-
SOF
24h 00m
2 stops
United Airlines Logo
2:20 pm - 10:59 pm
SOF
-
STL
16h 39m
2 stops
$759United Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
7:30 am - 11:00 am
STL
-
SOF
19h 30m
2 stops
Multiple Airlines Logo
6:20 am - 8:05 pm
SOF
-
STL
21h 45m
2 stops
$804Multiple Airlines
Tue, Jun 2 - Wed, Jun 17
Multiple Airlines Logo
1:00 pm - 11:00 am
STL
-
SOF
38h 00m
2 stops
Multiple Airlines Logo
12:55 pm - 8:05 pm
SOF
-
STL
39h 10m
2 stops
$806Multiple Airlines
Mon, Jun 1 - Wed, Jun 17
Multiple Airlines Logo
7:30 am - 11:00 am
STL
-
SOF
19h 30m
2 stops
Multiple Airlines Logo
6:20 am - 8:05 pm
SOF
-
STL
21h 45m
2 stops
$807Multiple Airlines
Tue, Jun 2 - Fri, Jun 19
Multiple Airlines Logo
7:30 am - 12:10 pm
STL
-
SOF
20h 40m
2 stops
Multiple Airlines Logo
8:00 am - 8:05 pm
SOF
-
STL
20h 05m
2 stops
$808Multiple Airlines
Tue, Jun 2 - Thu, Jun 18
Multiple Airlines Logo
7:30 am - 12:10 pm
STL
-
SOF
20h 40m
2 stops
Multiple Airlines Logo
6:20 am - 1:25 pm
SOF
-
STL
15h 05m
1 stop
$812Multiple Airlines
Tue, Jun 2 - Wed, Jun 17

United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets
United Airlines
May 5
STL8:30 amLambert-St Louis
19h 40m
2 stops
SOF12:10 pmSofia
May 17
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$700
United Airlines
May 5
STL7:30 amLambert-St Louis
20h 40m
2 stops
SOF12:10 pmSofia
May 17
SOF6:20 amSofia
15h 05m
1 stop
STL1:25 pmLambert-St Louis
$704
United Airlines
Feb 26
STL6:00 pmLambert-St Louis
20h 45m
2 stops
SOF10:45 pmSofia
Mar 2
SOF6:10 amSofia
23h 30m
2 stops
STL9:40 pmLambert-St Louis
$747

Air Canada flights from St. Louis to Sofia

Our best Air Canada deals on St. Louis to Sofia flight tickets
Air Canada
May 5
STL7:30 amLambert-St Louis
20h 40m
2 stops
SOF12:10 pmSofia
May 17
SOF6:10 amSofia
45h 55m
2 stops
STL8:05 pmLambert-St Louis
$708
Air Canada
Jun 2
STL1:00 pmLambert-St Louis
21h 40m
2 stops
SOF6:40 pmSofia
Jun 5
SOF6:20 amSofia
21h 45m
2 stops
STL8:05 pmLambert-St Louis
$817
Air Canada
May 30
STL2:20 pmLambert-St Louis
36h 40m
2 stops
SOF11:00 amSofia
Jun 5
SOF6:20 amSofia
21h 45m
2 stops
STL8:05 pmLambert-St Louis
$838

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 11, 2026.
Use the filters below to find and compare flights from St. Louis to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 5/5

8:30 am-12:10 pm

2 stops19h 40m

Sofia

Sun 5/17

6:20 am-1:25 pm

1 stop15h 05m

$700

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 5/5

7:30 am-12:10 pm

2 stops20h 40m

Sofia

Sun 5/17

6:20 am-1:25 pm

1 stop15h 05m

$704

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 5/5

7:30 am-12:10 pm

2 stops20h 40m

Sofia

Sun 5/17

6:10 am-8:05 pm

2 stops45h 55m

$708

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 2/26

6:00 pm-10:45 pm

2 stops20h 45m

Sofia

Mon 3/2

6:10 am-9:40 pm

2 stops23h 30m

$747

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Thu 2/26

2:45 pm-10:45 pm

2 stops24h 00m

Sofia

Mon 3/2

2:20 pm-10:59 pm

2 stops16h 39m

$759

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 6/2

7:30 am-11:00 am

2 stops19h 30m

Sofia

Wed 6/17

6:20 am-8:05 pm

2 stops21h 45m

$804

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Mon 6/1

1:00 pm-11:00 am

2 stops38h 00m

Sofia

Wed 6/17

12:55 pm-8:05 pm

2 stops39h 10m

$806

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 6/2

7:30 am-11:00 am

2 stops19h 30m

Sofia

Fri 6/19

6:20 am-8:05 pm

2 stops21h 45m

$807

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 6/2

7:30 am-12:10 pm

2 stops20h 40m

Sofia

Thu 6/18

8:00 am-8:05 pm

2 stops20h 05m

$808

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Tue 6/2

7:30 am-12:10 pm

2 stops20h 40m

Sofia

Wed 6/17

6:20 am-1:25 pm

1 stop15h 05m

$812

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Sofia from

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $879 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from St. Louis for as low as $791 on momondo.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 17% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Fastest flight time

19h 30m

Direct flights

None
The fastest flight from St. Louis to Sofia takes 19h 30m
There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.
Search flight deals

  • How far is Lambert-St Louis to Sofia by plane?

    A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 19h 30m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

    Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Sofia?

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $560Free CancellationRating
7.4
9,273 reviews
Search United Airlines flights
LufthansaPriceFrom $598Free CancellationRating
6.8
7,777 reviews
Search Lufthansa flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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